
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include "user_uart_serial.h"
#include "user_central_control.h"


	


int user_uart_serial_get_datalength(USER_UART_SERIAL_T *user_uart_serial_handle)
{
	//printf("data len is %d %d\r\n",user_uart_serial_handle->user_recvstart,user_uart_serial_handle->user_recvend);
	 if(user_uart_serial_handle->user_recvstart>=user_uart_serial_handle->user_recvend)
 	{
 		return	(user_uart_serial_handle->user_recvstart-user_uart_serial_handle->user_recvend);
 	}
	else
	{
		return (user_uart_serial_handle->user_recvbuff_len -user_uart_serial_handle->user_recvend+user_uart_serial_handle->user_recvstart);
	}
	
}

int user_uart_serial_check_data(USER_UART_SERIAL_T *user_uart_serial_handle,uint8_t* data,uint16_t len)
{
	int data_all_len=user_uart_serial_get_datalength(user_uart_serial_handle);
	uint16_t data_len_tmp1=user_uart_serial_handle->user_recvbuff_len-user_uart_serial_handle->user_recvend;
	if((data_all_len>0)&&(data_all_len<=user_uart_serial_handle->user_recvbuff_len))
	{
		if(data_all_len>=len)
		{
			data_all_len=len;
		}
		if(data_len_tmp1>=data_all_len)
		{
			memcpy(data,user_uart_serial_handle->user_recvbuff+user_uart_serial_handle->user_recvend,data_all_len);
		}
		else
		{
			memcpy(data,user_uart_serial_handle->user_recvbuff+user_uart_serial_handle->user_recvend,data_len_tmp1);
			memcpy(data+data_len_tmp1,user_uart_serial_handle->user_recvbuff,(data_all_len-data_len_tmp1));
		}
		return data_all_len;
	}
	else
	{
		return 0;
	}

}
int user_uart_serial_get_data(USER_UART_SERIAL_T *user_uart_serial_handle,uint8_t* data,uint16_t len)
{
	int data_all_len=user_uart_serial_get_datalength(user_uart_serial_handle);
	uint16_t data_len_tmp1=user_uart_serial_handle->user_recvbuff_len-user_uart_serial_handle->user_recvend;
	uint8_t i;
	if((data_all_len>0)&&(data_all_len<=user_uart_serial_handle->user_recvbuff_len))
	{
		if(data_all_len>=len)
		{
			data_all_len=len;
		}
		if(data_len_tmp1>=data_all_len)
		{
			memcpy(data,user_uart_serial_handle->user_recvbuff+user_uart_serial_handle->user_recvend,data_all_len);
		}
		else
		{
			memcpy(data,user_uart_serial_handle->user_recvbuff+user_uart_serial_handle->user_recvend,data_len_tmp1);
			memcpy(data+data_len_tmp1,user_uart_serial_handle->user_recvbuff,(data_all_len-data_len_tmp1));
		}
		for(i=0;i<data_all_len;i++)
		{
			user_uart_serial_end_add1(user_uart_serial_handle);
		}
		return data_all_len;
	}
	else
	{
		return 0;
	}

}


void user_uart_serial_end_add1(USER_UART_SERIAL_T *user_uart_serial_handle )
{
	if(user_uart_serial_handle->user_recvend==(user_uart_serial_handle->user_recvbuff_len-1))
	{
		user_uart_serial_handle->user_recvend=0;
	}
	else
	{
		user_uart_serial_handle->user_recvend++;
	}

}

void user_uart_serial_init(USER_UART_SERIAL_T *user_uart_serial_handle)
{
	memset(user_uart_serial_handle->user_recvbuff,0,user_uart_serial_handle->user_recvbuff_len);
	
	user_uart_serial_handle->user_recvstart=0;
	user_uart_serial_handle->user_recvend=0;
}


void user_uart_serial_add_data(USER_UART_SERIAL_T *user_uart_serial_handle,uint8_t data)
{
	user_uart_serial_handle->user_recvbuff[user_uart_serial_handle->user_recvstart]=data;
	if(user_uart_serial_handle->user_recvstart==(user_uart_serial_handle->user_recvbuff_len-1))
	{
		user_uart_serial_handle->user_recvstart=0;
	}
	else
	{
		user_uart_serial_handle->user_recvstart++;
	}
}

static const uint16_t wCRCTable[] = {
 0X0000, 0XC0C1, 0XC181, 0X0140, 0XC301, 0X03C0, 0X0280, 0XC241,
 0XC601, 0X06C0, 0X0780, 0XC741, 0X0500, 0XC5C1, 0XC481, 0X0440,
 0XCC01, 0X0CC0, 0X0D80, 0XCD41, 0X0F00, 0XCFC1, 0XCE81, 0X0E40,
 0X0A00, 0XCAC1, 0XCB81, 0X0B40, 0XC901, 0X09C0, 0X0880, 0XC841,
 0XD801, 0X18C0, 0X1980, 0XD941, 0X1B00, 0XDBC1, 0XDA81, 0X1A40,
 0X1E00, 0XDEC1, 0XDF81, 0X1F40, 0XDD01, 0X1DC0, 0X1C80, 0XDC41,
 0X1400, 0XD4C1, 0XD581, 0X1540, 0XD701, 0X17C0, 0X1680, 0XD641,
 0XD201, 0X12C0, 0X1380, 0XD341, 0X1100, 0XD1C1, 0XD081, 0X1040,
 0XF001, 0X30C0, 0X3180, 0XF141, 0X3300, 0XF3C1, 0XF281, 0X3240,
 0X3600, 0XF6C1, 0XF781, 0X3740, 0XF501, 0X35C0, 0X3480, 0XF441,
 0X3C00, 0XFCC1, 0XFD81, 0X3D40, 0XFF01, 0X3FC0, 0X3E80, 0XFE41,
 0XFA01, 0X3AC0, 0X3B80, 0XFB41, 0X3900, 0XF9C1, 0XF881, 0X3840,
 0X2800, 0XE8C1, 0XE981, 0X2940, 0XEB01, 0X2BC0, 0X2A80, 0XEA41,
 0XEE01, 0X2EC0, 0X2F80, 0XEF41, 0X2D00, 0XEDC1, 0XEC81, 0X2C40,
 0XE401, 0X24C0, 0X2580, 0XE541, 0X2700, 0XE7C1, 0XE681, 0X2640,
 0X2200, 0XE2C1, 0XE381, 0X2340, 0XE101, 0X21C0, 0X2080, 0XE041,
 0XA001, 0X60C0, 0X6180, 0XA141, 0X6300, 0XA3C1, 0XA281, 0X6240,
 0X6600, 0XA6C1, 0XA781, 0X6740, 0XA501, 0X65C0, 0X6480, 0XA441,
 0X6C00, 0XACC1, 0XAD81, 0X6D40, 0XAF01, 0X6FC0, 0X6E80, 0XAE41,
 0XAA01, 0X6AC0, 0X6B80, 0XAB41, 0X6900, 0XA9C1, 0XA881, 0X6840,
 0X7800, 0XB8C1, 0XB981, 0X7940, 0XBB01, 0X7BC0, 0X7A80, 0XBA41,
 0XBE01, 0X7EC0, 0X7F80, 0XBF41, 0X7D00, 0XBDC1, 0XBC81, 0X7C40,
 0XB401, 0X74C0, 0X7580, 0XB541, 0X7700, 0XB7C1, 0XB681, 0X7640,
 0X7200, 0XB2C1, 0XB381, 0X7340, 0XB101, 0X71C0, 0X7080, 0XB041,
 0X5000, 0X90C1, 0X9181, 0X5140, 0X9301, 0X53C0, 0X5280, 0X9241,
 0X9601, 0X56C0, 0X5780, 0X9741, 0X5500, 0X95C1, 0X9481, 0X5440,
 0X9C01, 0X5CC0, 0X5D80, 0X9D41, 0X5F00, 0X9FC1, 0X9E81, 0X5E40,
 0X5A00, 0X9AC1, 0X9B81, 0X5B40, 0X9901, 0X59C0, 0X5880, 0X9841,
 0X8801, 0X48C0, 0X4980, 0X8941, 0X4B00, 0X8BC1, 0X8A81, 0X4A40,
 0X4E00, 0X8EC1, 0X8F81, 0X4F40, 0X8D01, 0X4DC0, 0X4C80, 0X8C41,
 0X4400, 0X84C1, 0X8581, 0X4540, 0X8701, 0X47C0, 0X4680, 0X8641,
 0X8201, 0X42C0, 0X4380, 0X8341, 0X4100, 0X81C1, 0X8081, 0X4040 };
uint16_t CRC16 (const uint8_t *nData, uint16_t wLength)
{
	uint8_t nTemp;
	uint16_t wCRCWord = 0xFFFF;
	while (wLength--)
	{
		nTemp = *nData++ ^ wCRCWord;
		wCRCWord >>= 8;
		wCRCWord ^= wCRCTable[nTemp];
	}
	return wCRCWord;
}

